The first two Yellow Magic Orchestra albums, after having heard Tong Poo on the radio last week.
f*cking love YMO. Their first self-titled album is their best imo. Cosmic Surfin' is amazing, as well as Simoon. I love the early video game sounds too! These guys were just as much pioneers with synthesizers as Kraftwerk, but much lesser known in the west.
Other great albums of theirs are:
Solid State Survivor - great cover of The Beatles' Day Tripper and Michael Jackson even recorded vocals for a cover of Behind the Mask, released on his posthumous album Michael.
Technodelic - pure early synth experimental bliss. I like this one almost as much as the first but for different reasons. There will never be another album that sounds like this, ever. Brilliant.
Technodon - their 90's album which I was hesitant about but it's top notch. Best enjoyed when you're in a chill mood with a nice beer or two.